Doorbell



FIG. 1 is a higher perspective view of a first embodiment of a doorbell showing the new design;

FIG. 2 is a rear perspective view of the doorbell design of FIG. 1;

FIG. 3 is a front view of the doorbell design of FIG. 1;

FIG. 4 is a rear view of the doorbell design of FIG. 1;

FIG. 5 is a left side view of the doorbell design of FIG. 1;

FIG. 6 is a right side view of the doorbell design of FIG. 1;

FIG. 7 is a top view of the doorbell design of FIG. 1; and,

FIG. 8 is a bottom view of the doorbell design of FIG. 1.

FIG. 9 is a higher perspective view of a second embodiment of a doorbell showing the new design;

FIG. 10 is a rear perspective view of the doorbell design of FIG. 9;

FIG. 11 is a front view of the doorbell design of FIG. 9;

FIG. 12 is a rear view of the doorbell design of FIG. 9;

FIG. 13 is a left side view of the doorbell design of FIG. 9;

FIG. 14 is a right side view of the doorbell design of FIG. 9;

FIG. 15 is a top view of the doorbell design of FIG. 9; and,

FIG. 16 is a bottom view of the doorbell design of FIG. 9.

The broken lines illustrate portions of the doorbell that form no part of the claimed design. 

CLAIM The ornamental design for a doorbell, as shown and described. 